The preseason is about exposing and correcting flaws. Coaches are worried. That's just what they do. They look at their team and see the problems because every team has them. After one full preseason week, here's what we'd be concerned about for all 32 teams.

Arizona Cardinals: No matter what they say, Cardinals brass would prefer Kevin Kolb take the quarterback job. They are paying him huge money and gave up draft picks for him. But Kolb only seems to be regressing. The discouraging thing here is that new favoriteJohn Skelton hasn't looked particularly good either in practices or in preseason games.

Baltimore Ravens: The Ravens have the same problems they started camp with. They don't know who they can trust at left tackle, and no one has stepped up in the battle for the backup running back job.

Buffalo Bills: By all accounts, backup quarterbacks Tyler Thigpen and Vince Young have both struggled throughout camp. The offense from top to bottom was manhandled by the Redskins in the preseason opener.

Detroit Lions: It's now mid-August and we still don't know anything more about when running back Jahvid Best will return to the field from his concussion problems. Second year-pro running back Mikel Leshoure has been hurt all camp. They are relying on Kevin Smith way too much.

Green Bay Packers: No team has been hit harder by the injury bug. The Packers' depth at tackle and running back are big concerns. Linebacker Desmond Bishop will be very difficult to replace.

Jacksonville Jaguars:Blaine Gabbert enjoyed one strong drive and a few ugly plays after that in his preseason opener. We'd be a little worried (but not surprised) that Laurent Robinson may be overmatched as a "No. 1" receiver.

Kansas City Chiefs: First-round draft pick Dontari Poe is falling down the depth chart during the part of camp when top-12 picks are supposed to climb.

Miami Dolphins: Cutting Chad Johnson was the right move. But it's hard to see any quarterback having a lot of success with the supporting cast in place in Miami.

Minnesota Vikings: The preseason opener did nothing to erase our suspicions that the Vikings have one of the worst defenses in football.

New England Patriots: There are more questions on the offensive line than when camp started. Guard Brian Waters is nowhere to be found, Robert Gallery retired and tackle Sebastian Vollmer is hurt. Players take on different roles daily.

San Diego Chargers: The Chargers are counting so much on running back Ryan Mathews. When he returns from his broken collarbone, how can they be confident he's going to be the 350-touch guy they expect?

St. Louis Rams: The Rams' preseason opener was an embarrassment. Even if the defense improves under Jeff Fisher, it's hard to see this offensive line being any good.

Tampa Bay Buccaneers: The Bucs have enjoyed a strong camp. We have the same questions about their overall defensive talent as ever, but coach Greg Schiano has to feel good about the last few weeks.

Tennessee Titans:Kenny Britt hasn't been suspended yet. He also hasn't practiced, which is no surprise coming off his third surgery since last season. Chris Johnson also had a disappointing preseason debut with a pair of drops and negative plays.